<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <div id="app">
      姓：<input type="text" v-model="firstName" /> <br />
      名：<input type="text" v-model="lastName" /> <br />
      全名：{{fullName}} <br />
      <input type="text" v-model="fullName" />
      全名：{{fullName2}} <br />
      <input type="text" v-model="fullName2" />
    </div>

    <script src="./vue.js"></script>
    <script>
      new Vue({
        el: '#app',
        data() {
          return {
            firstName: 'Chan',
            lastName: 'Zany',
          }
        },
        computed: {
          //getter
          fullName() {
            console.log('计算属性：全名')
            return this.firstName + ' ' + this.lastName
          },
          //getter+setter(固定方法名)
          fullName2: {
            get() {
              console.log('计算属性--getter')
              return this.firstName + ' ' + this.lastName
            },
            set(value) {
              console.log('计算数学--setter:' + value)
              let names = value.split(' ')
              this.firstName = names[0]
              this.lastName = names[1]
            },
          },
        },
      })
    </script>
  </body>
</html>
